cxx-mem-model merge [6 of 9] - libstdc++-v3

[Hans-Peter Nilsson]

> From: Andrew MacLeod <amacleod@redhat.com>
> Date: Mon, 7 Nov 2011 05:25:15 +0100

> On 11/06/2011 07:38 PM, Hans-Peter Nilsson wrote:
> >
> > This (formally a change in the range 181027:181034) got me three
> > libstdc++ regressions for cris-elf, which has no "atomic"
> > support whatsoever (well, not the version represented in
> > "cris-elf"), so something is amiss at the bottom of the default
> > path:
> yes, I have a final pending patch which didn't make it to the branch
> before the merge.  It changes the behaviour of atomic_flag on targets
> with no compare_and_swap.  I *think* it will resolve your problem.
> 
> I've attached the early version of the patch which you can try. Its
> missing a documentation change I was going to add tomorrow before
> submitting, but we can see if it resolves your problem.  Give it a shot
> and let me know.

Sorry, no it didn't help.  No additional regressions either
though, but the undef'd reference changed to two:

Excess errors:
/tmp/atreg1/gccobj/cris-elf/libstdc++-v3/include/bits/atomic_base.h:273: undefined reference to `std::atomic_thread_fence(std::memory_order)'
/tmp/atreg1/gccobj/cris-elf/libstdc++-v3/include/bits/atomic_base.h:274: undefined reference to `__sync_lock_test_and_set_1'
collect2: error: ld returned 1 exit status

brgds, H-P